Volume 49, Number 5, March I 2000
|Page(s)||624 - 630|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
The surface composition and spin polarization of NiMnSb epitaxial thin films
CNRS Laboratoire Louis Néel - 25 avenue des Martyrs BP 166, 38042
Grenoble Cedex 09, France
2 Department of Physics and Astronomy and Center for Materials Research and Analysis Behlen Laboratory of Physics, University of Nebraska-Lincoln Lincoln, NE 68588-0111, USA
Corresponding author: email@example.com
Accepted: 15 December 1999
The composition in the surface region of the Heusler alloy NiMnSb has been studied using angle-resolved X-ray photoemission spectroscopy, low-energy electron diffraction and spin-polarized inverse photoemission. The results are consistent with a generally Mn-Sb terminal layer, though the surface composition is very sensitive to preparation. The surface composition has a critical influence on the polarization near the Fermi level in spin-polarized inverse photoemission. Under some conditions, the polarization at the Fermi level for normal incidence inverse photoemission can reach values very close to 100% above background.
PACS: 71.20.Lp – Intermetallic compounds / 73.20.At – Surface states, band structure, electron density of states / 75.25.+z – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source X-ray scattering, etc.)
© EDP Sciences, 2000
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